mermaid-js zenuml-core up to 3.23.24 Markdown Comment cross site scripting

Summaryinfo

A vulnerability was found in mermaid-js zenuml-core up to 3.23.24. It has been declared as problematic. This affects an unknown function of the component Markdown Comment Handler. The manipulation results in cross site scripting. This vulnerability is reported as CVE-2024-38527. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in mermaid-js zenuml-core up to 3.23.24. It has been classified as problematic. Affected is some unknown processing of the component Markdown Comment Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

ZenUML is JavaScript-based diagramming tool that requires no server, using Markdown-inspired text definitions and a renderer to create and modify sequence diagrams. Markdown-based comments in the ZenUML diagram syntax are susceptible to Cross-site Scripting (XSS). The comment feature allows the user to attach small notes for reference. This feature allows the user to enter in their comment in markdown comment, allowing them to use common markdown features, such as `**` for bolded text. However, the markdown text is currently not sanitized before rendering, allowing an attacker to enter a malicious payload for the comment which leads to XSS. This puts existing applications that use ZenUML unsandboxed at risk of arbitrary JavaScript execution when rendering user-controlled diagrams. This vulnerability was patched in version 3.23.25,

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2024-38527 since 06/18/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 3.23.25 eliminates this vulnerability.

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Productinfo

Vendor

• mermaid-js

Name

• zenuml-core

Version

• 3.23.0
• 3.23.1
• 3.23.2
• 3.23.3
• 3.23.4
• 3.23.5
• 3.23.6
• 3.23.7
• 3.23.8
• 3.23.9
• 3.23.10
• 3.23.11
• 3.23.12
• 3.23.13
• 3.23.14
• 3.23.15
• 3.23.16
• 3.23.17
• 3.23.18
• 3.23.19
• 3.23.20
• 3.23.21
• 3.23.22
• 3.23.23
• 3.23.24

Website

• Product: https://github.com/mermaid-js/zenuml-core/

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